The latest round up of OTT Video news, deals, launches and products Dish Network and Nielsen announced an agreement to improve Nielsen’s local TV ratings service by integrating Dish’s aggregated set top data. Anonymized data from millions of Dish households across 210 markets areas will be combined with insights from Nielsen’s local market – allowing for a deeper understanding of viewing habits and increased metrics reliability. Video compression firm V-Nova will be demonstrating its Perseus software at next week’s NAB show in Las Vegas. The company will be staging live demos powering live and on-demand IPTV systems, which V-Nova claims allows an unnamed tier 1 pay TV operator to halve the bitrate of its HD channels, extending the reach of…